Paper bag.



J. H. BARTLETT.

PAPER BAG.

APPLICATION FILED DEG.19, 1911.

Patented May 21, 1912.

JULIA H. BARTLETT, or summons, MARYLAND.-

rnrrm. BAG.

Specification of Letters Patent.

Application filed December 19,1911. Serial No, 666,802.

170 all whom a m conc'er'ni Be itknown that I, JULIA H. BARTLETT, of theclty. of Baltimore and State of Maryland, have invented certainImprovements in Paper Bags, of which the following is a specification. A

The invention relates to a peculiar construction of the. joint at thebottom of a paper bag, whereby the same. is rendered air andwater tight,as will hereinafter fully appear. p

In the further. description of the said invention which follows,reference is made to the accompanying drawing, forming a part hereof andin which Figure 1 is. a front or face view of the bag as it appearsafter the ordinary application thereto of the paste used to produce'thebottom joint, and before the pasted surface is turned up at 0-1) andfolded upon the surface of the bag above it. Fig. 2 illustrates asimilar view of the lower end of the bag, after the usual fold has beenmade, and after the outer surface of a portion of the upturned flap hasbeen provided with a coating of paste to prepare the bag for a secondfolding in accordance with the present invention. Fig. 3 shows the bagafter the second fold has been made, and the bottom of the bagcompleted. Fig. 4: is an enlarged section taken on the broken line ww inFig. 2 showing the ordinary fold; and Fig.

5 is an enlarged section taken on the broken .line y-y in Fig. 3illustrating the improved fold.

Referring now to Fig. 1 of the drawing it will be seen that the upperside 1 of the bag, which in the. present case is the side having thelongitudinal seam a, is made shorter thanthe lower side 2, except at thelateral edges where for a limited width, the two. sides have a commonlength, thus pro- The construction as monly in use, and its ob ect is toadmlt of the exposure of a narrow strip of the inner surface of thelower side 2 of the bag'to' which paste can be applied, and at the sametime prevent as far as 1s posslble, openings being left at the cornersb, b when the bag is folded as slTo'wn in 2. It will howdescribed is.com- I ever be seen that in applying paste 'to-the bag as shown by thestipple'd surface-in Fig. 1 and which-surface is generally produced bymeans of a roller or br'ush, there Patented'May 21, 191 2.

will be no paste underthe ears 3 (see the lower right-hand corner inthat figure) and when the ordinary fold'is made, the ears are pasted tothe outer surface of the upper side 1 of the bag, but not to the:innersurface of the upt11rned;fiap ;and in consequence, there is produced an;open channel 0 which leads from theint'erior of the bag to the; outerair, as shown inIFig'. 4, through which liquid contents of the bag canescape.

The object of the present "invention isto.

seal the channel 0 and thereby renderthe bag completely water tight atthe lower corners, and it consists as" follows: After the ioint as shownin section in Fig. 4 and which exhibits the open channel a, is -com-.

pleted, paste is applied to the outer-surface of the upturned flap, andtheend of the bag on the broken linez-z in Fig. 2 which is below theends of the ears 3 bent'upward and pressed closely in contactwith-theloutside of the bag above, as shown in Figs. 3 and 5, whichserves to close thechannel c and prevent leakage at the lower corners ofthe bag, which would not be the case should ifzlhefold be made above theedge of the first I claim as my invention:

In a paper bag in a fiat condition, and its outer side having the ears 3formed'as described, the method of producing a watertightbottom in thebag, which consistsin applying to the lower end ofthe bag and over theears thereof, a strip of aste of such width as to extend above t e ears,

then folding the pasted portion upon the surface of the bag above it,then applying paste to the outer surface of the upturned flap andfolding the bag on a line which is;

below the upper edge of the first flap, and then pressing the secondflap closely in contact with the surface of the bag above it.

JULIA H. BARTLETT.

Witnesses: L

-WM. T. HOWARD, ,SARAH Sofio'r'm.

